International Journal of Engineering, Science and Technologyhttp://www.ajol.info/index.php/ijest
<em>International Journal of Engineering, Science and Technology</em> (IJEST) - an E-journal is an international peer-reviewed, electronic, online journal published by MultiCraft. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of engineering, science and technology. IJEST publishes articles that emphasizes research, development and application within the fields of engineering, science and technology. Original theoretical work and application-based studies, which contributes to a better understanding of engineering, science and technological challenges, are encouraged. All manuscripts are pre-reviewed by the editor, and if appropriate, sent for blind peer review. Contributions must be original, not previously or simultaneously published elsewhere, and are critically reviewed before they are published. Papers, which must be written in English, should have sound grammar and proper terminologies. <br /><br /> Other sites related to this journal: <a title="http://www.ijest-ng.com/" href="http://www.ijest-ng.com/" target="_blank">http://www.ijest-ng.com/</a>MultiCraft Limiteden-USInternational Journal of Engineering, Science and Technology2141-2820Copyright belongs to the journal

Investigation of mechanical properties of luffa cylindrica fibre reinforced epoxy hybrid compositehttp://www.ajol.info/index.php/ijest/article/view/110347
<p>In this present work, the effect of stacking sequence on mechanical properties of untreated luffa cylindrica and glass fibre reinforced epoxy hybrid composites has been investigated experimentally. Composite laminates were fabricated by hand layup technique. All the composites were made with a total of 4 plies, by varying the number and position of glass layers so as to obtain six different stacking sequences. One group of neat epoxy samples was also fabricated for comparison purpose. Samples were analysed for their mechanical and flexural properties to establish the effect of various stacking sequence. It is found that the optimum properties (tensile and flexural strength) are achieved from hybrid laminate (S5) i.e. by placing two luffa cylindrica fibre mats at the middle when supported by two glass fibre mats on<br />either side.</p><p><br /><strong>Keywords</strong>: Luffa cylindrica-glass hybrid, Tensile strength, Flexural strength, ILSS, SEM.</p>N MohantaSK Acharya2014-12-012014-12-0171Investigating mass customization and sustainability compatibilitieshttp://www.ajol.info/index.php/ijest/article/view/110348
<p>This paper examines the relationships between sustainability and mass customization in the business field. First a literature review investigates their enablers. This section ends with empirical conclusions about the impact of mass customization on sustainability highlighting some complementarities between these two concepts. Then three case studies illustrate the relevance of the identified enablers to different business sectors. The case studies show that several sustainability and mass customization enablers are deployed within same industrial contexts, thus pointing out potential synergies between them. The lack of sustainability and mass customization frameworks at the operational level is a major barrier for further investigation of the above synergies.</p><p><br /><strong>Keywords:</strong> Mass customisation, sustainability, enablers, sustainable mass customisation.</p>K MediniJ Le DuigouC Da CunhaA Bernard2014-12-012014-12-0171An experimental study on effect of process parameters in deep drawing using Taguchi techniquehttp://www.ajol.info/index.php/ijest/article/view/110350
<p>The effects of various deep drawing process parameters were determined by experimental study with the use of Taguchi fractional factorial design and analysis of variance for AA6111 aluminum alloy. The optimum process parameters were determined based on their influence on the thickness variation at different regions of the blank material. Three important process parameters i.e., punch nose radius, die shoulder radius and blankholder force were investigated in this study. Plan of experiments based on Taguchi’s technique were used for acquiring the data. An orthogonal array, the signal to noise ratio and the analysis of variance were<br />employed to investigate the deep drawability characteristics. Influence on thickness due to variation of these parameters was individually evaluated in terms of percentage. The results showed that the blankholder force (56.98%) was the most significant parameter followed by punch nose radius (30.12%) and the least influence (12.90%) was with die profile radius.</p><p><strong>Keywords</strong>: Axisymmetric deep drawing, Taguchi method, orthogonal array, S/N ratio, anova</p>ACS ReddyS RajeshamPR ReddyTP KumarJ Goverdhan2014-12-012014-12-0171Modelling flow dynamics in water distribution networks using artificial neural networks - A leakage detection techniquehttp://www.ajol.info/index.php/ijest/article/view/110352
<p>Computational approaches can be used to detect leakages in water distribution networks. One such approach is the Artificial Neural Networks (ANNs) technique. The advantage of ANNs is that they are robust and can be used to model complex linear and non-linear systems without making implicit assumptions. ANNs can be trained to forecast flow dynamics in a water distribution network. Such flow dynamics can be compared with water demands in a particular district metered area. The objective of this study was to model flow dynamics in four district metered areas of the City of Harare, Zimbabwe using the ANNs technique in an effort to detect systems leakages. A multi-layer feed-forward back-propagation artificial neural network was used for modelling the flow and simulate water demand using a Matlab Neural Network Toolkit. The difference between actual water consumed (metered consumption) and the simulated water demand for a district metered area represents the water leakage in the water distribution network of the district metered area. It was discovered that an ANN could be trained and be used to forecast flow with up to 99% confidence. Thus, ANNs technique is a flexible and efficient approach to detection of leakages in water distribution networks.</p><p><strong>Keywords</strong>: Artificial neural network; Leakage detection technique; Water distribution; Leakages</p>E MakayaO Hensel2014-12-012014-12-0171PSO-based optimization of PI regulator and VA loading of a SRF-based multiconverter DVRhttp://www.ajol.info/index.php/ijest/article/view/110355
<p>This paper deals with a design of optimal parameters of PI regulator in voltage control loop. The design aims to minimize volt-ampere (VA) loading of synchronous reference frame (SRF) based multi converter-DVR in parallel feeder distribution systems. To improve the power quality by using power conditioner with multi converters in each feeder distribution system under different load considerations, a dynamic model of synchronous-reference- frame (SRF) has been adopted. It is desirable to have optimization of PI components and generate the reference compensate voltages for series active filters (SAF) of MC-DVR. Therefore, series active filters help to inject optimal voltages at optimal angle in such a way that a minimum VA loading of MC-DVR is possible. The optimal value PI components and optimal series injected angle of series active power filters are computed using particle swarm optimization (PSO) technique and the results are verified with genetic algorithm (GA). The simulation results show that the proposed PSO technique causes minimum error and minimum VA loading angle by optimally choosing parameters of PI and minimum VA angle as compared to GA technique.<br /><strong></strong></p><p><strong>Keywords</strong>: Active power filter (APF), synchronous reference frame (SRF), Genetic algorithm (GA), Particle Swarm Optimization (PSO) and multi converter dynamic voltage restorer (MC-DVR)</p>PV NaiduB Basavaraja2014-12-012014-12-0171